The above is my code. Its working fine.
Still having another problem.If i want to increase the size for anyone text area means how to do for that.Because now for all the textarea input the size is increasing.
Also please tell me how to work with the above code for font name and also i want to know how to do the color palatte.For example in our word document button A will be there.By clicking the A the colour palatte is viewed and from that we can select the colour what we want.Please tell me how to do this. Else is there any other way for doing this. Please tell me.

Also please tell me is it possible to do like,for example i'm entering a text as "welcome to w3schoolsforum". In this i just want to highlight the word w3schoolsforum alone.Is it possible to do.